An artist's impression of a joint venture development at Shelly Bay by the Port Nicholson Block Development Trust and The Wellington Company.

The future of Shelly Bay is uncertain after opponents to a proposed development challenged its sale.

A motion was passed at the annual meeting of the Port Nicholson Block Settlement Trust (PNBST) on Saturday, calling on the board to cease its discussions with developer Ian Cassels.

Last month the trust confirmed it had entered a joint venture with the Wellington Company, Cassels company, just months after members voted down a different proposal with the same company.

The trust took ownership of the land in 2010 as part of a Treaty of Waitangi settlement. Since then there have been a series of proposals to develop the land, however none have progressed and the buildings are deteriorating.